#This lib is to contain
#functions p(x), q(x)
#and f(x).
import math

def p(x):
    return 1.5/(x+1)
    #return -2/(x+1)**2

def q(x):
    return 0

def f(x):
    #return 9/(2*(x+1)**(3/2))
    return 2/math.sqrt(x+1)
